METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING TIME DIVISION DUPLEX FRAME CONFIGURATION INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20120320806A1
• Filed: 06/20/2012
• Published: 12/20/2012
• Est. Priority Date: 06/20/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JI, Hyoungju, KIM, Younsun, KIM, Youngbum, CHO, Joonyoung, CHOI, Seunghoon
• Granted Patent: US 9,438,334 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method and an apparatus for transmitting and receiving Time Division Duplex (TDD) frame configuration information are disclosed. The base station transmits TDD frame configuration information as system information to a user equipment through a common control channel so as to dynamically change the TDD frame configuration according to uplink and downlink traffic conditions. The base station may deliver the same system information to all user equipments in the cell, removing ambiguity in User Equipment (UE) operations and avoiding interference. In comparison to an existing method of delivering TDD frame configuration information through system information update, the disclosed method enables user equipments to rapidly cope with traffic changes. In addition, user equipments may receive and apply TDD frame configuration information at the same time.

Claims

1. A method of transmitting Time Division Duplex (TDD) frame configuration information for a base station in a wireless communication system, the method comprising:

determining a TDD frame configuration by assigning a transmission direction to a dynamic subframe in a TDD frame;

generating system information based on information on the TDD frame configuration; and

transmitting the system information by inserting the system information into a common control channel.

2. The method of claim 1, wherein the generating of the system information comprises making the size of the system information equal to that of Downlink Control Information (DCI) for the common control channel.

3. The method of claim 1, wherein the generating of the system information comprises attaching a Cyclic Redundancy Check (CRC) sequence scrambled with a Radio Network Temporary Identifier (RNTI) defined for TDD frame configuration information to the system information.

4. The method of claim 1, wherein the generating of the system information comprises aggregating individual TDD frame configuration information of multiple carriers used in the wireless communication system into the system information.

5. A method of receiving Time Division Duplex (TDD) frame configuration information for a user equipment in a wireless communication system, the method comprising:

receiving system information on a common control channel;

identifying a TDD frame configuration indicating a transmission direction of a dynamic subframe in a TDD frame by analyzing the system information; and

utilizing the dynamic subframe according to the transmission direction thereof.

6. The method of claim 5, wherein the system information has a size equal to that of Downlink Control Information (DCI) for the common control channel.

7. The method of claim 5, wherein the receiving of the system information comprises conducting blind decoding of the common control channel with a Radio Network Temporary Identifier (RNTI) defined for TDD frame configuration information.

8. The method of claim 5, wherein the system information is created by aggregating individual TDD frame configuration information of multiple carriers used in the wireless communication system.

9. An apparatus for transmitting Time Division Duplex (TDD) frame configuration information in a base station of a wireless communication system, the apparatus comprising:

a controller for determining a TDD frame configuration by assigning a transmission direction to a dynamic subframe in a TDD frame;

a system information generator for generating system information based on information on the TDD frame configuration; and

a control channel generator for inserting the system information into a common control channel for transmission.

10. The apparatus of claim 9, wherein the system information generator makes the size of the system information equal to that of Downlink Control Information (DCI) for the common control channel.

11. The apparatus of claim 9, wherein the system information generator attaches a Cyclic Redundancy Check (CRC) sequence scrambled with a Radio Network Temporary Identifier (RNTI) defined for TDD frame configuration information to the system information.

12. The apparatus of claim 9, wherein the system information generator aggregates individual TDD frame configuration information of multiple carriers used in the wireless communication system into the system information.

13. An apparatus for receiving Time Division Duplex (TDD) frame configuration information in a user equipment of a wireless communication system, the apparatus comprising:

a control channel receiver for receiving system information on a common control channel;

a system information analyzer for identifying a TDD frame configuration indicating a transmission direction of a dynamic subframe in a TDD frame by analyzing the system information; and

a controller for utilizing the dynamic subframe according to the transmission direction thereof.

14. The apparatus of claim 13, wherein the system information has a size equal to that of Downlink Control Information (DCI) for the common control channel, and wherein, when multiple carriers are used in the wireless communication system, the system information is created by aggregating individual TDD frame configuration information of the multiple carriers.

15. The apparatus of claim 13, wherein the control channel receiver comprises a blind decoder that conducts blind decoding of the common control channel with a Radio Network Temporary Identifier (RNTI) defined for TDD frame configuration information.

16. A method of transmitting Time Division Duplex (TDD) frame configuration information for a base station in a wireless communication system, the method comprising:

inserting TDD frame configuration information indicating a transmission direction of a dynamic subframe in a TDD frame into a downlink data channel; and

transmitting the downlink data channel to a user equipment,

wherein the TDD frame configuration information is contained in a MAC header of the downlink data channel.

17. A method of receiving Time Division Duplex (TDD) frame configuration information for a user equipment in a wireless communication system, the method comprising:

receiving a downlink data channel carrying TDD frame configuration information indicating a transmission direction of a dynamic subframe in a TDD frame from a corresponding base station; and

utilizing the dynamic subframe according to the transmission direction thereof,

wherein the TDD frame configuration information is contained in a MAC header of the downlink data channel.

18. An apparatus for transmitting Time Division Duplex (TDD) frame configuration information in a base station of a wireless communication system, the apparatus comprising:

a wireless communication unit for sending and receiving a signal to and from a user equipment; and

a controller for controlling an operation to transmit a downlink data channel carrying TDD frame configuration information indicating a transmission direction of a dynamic subframe in a TDD frame to the user equipment,

wherein the TDD frame configuration information is contained in a MAC header of the downlink data channel.

19. An apparatus for receiving Time Division Duplex (TDD) frame configuration information in a user equipment of a wireless communication system, the apparatus comprising:

a wireless communication unit for sending and receiving a signal to and from a corresponding base station; and

a controller for controlling an operation to receive a downlink data channel carrying TDD frame configuration information indicating a transmission direction of a dynamic subframe in a TDD frame from the base station and to utilize the dynamic subframe according to the transmission direction thereof,

wherein the TDD frame configuration information is contained in a MAC header of the downlink data channel.